I've got a 1998 Jimmy SLE 4x4 4dr and the 4x4 10 amp fuse keeps blowing. The other symptoms: Fule gauge reads empty and the battery light is on.

After reading some of the other forum posts I found that by disengaging the vacuum line on the actuator under the battery plate the fuse will stop blowing. I can confirm that this works, however, I'm not sure what to do next. Some say change the vacuum switch on the T-Case and other's say trace the electrical lines to verify that there is not a frayed wire grounding out.

Could the vacuum switch cause 4wd to engage, thus overloading the control motor and blowing the 4wd fuse? Just looking for ideas here before replacing $35 to $150 switches. I would love to get some help from the professionals here so any directions will be greatly appreciated.

 

I am now having this same problem with one of my 2 98 Blazers. 221000 miles. Bravada axle swap. New Transfer Case Shift Motor (Confirmed working.)

I unplug 4x4 switch, unplug TCCM, Still blows fuse but only after shifting into gear and waiting several seconds with the engine running. When the fuse blows it takes out the 4x4 switch immediately but later the gear selector back light fails. When I turn off the ignition and then restart the engine the Temp gauge goes to 0 and fuel gauge goes to full empty. Low Fuel warning light comes on and battery light comes on constant but volt meter and oil pressure gauge are normal.

Fuse does not blow with key in run position but motor not running.

Anyone had further issues or solutions?

 

another necro post. Please start your own thread and I will try to help you. thread closed.